The Centre for Hybrid and Organic Solar Energy (CHOSE) of the University of Rome "Tor Vergata", was created on December 2006 from a collaboration between the Lazio Region of Italy and the University of Rome "Tor Vergata" sharing the considerable intention to realize a Centre of Excellence for the research and development of a new generation solar cells based on organic and organic-inorganic hybrid technologies.
This is part of a larger strategy within the Lazio Region of Italy in which other centers (on Sustainable Mobility and on Hydrogen) have been funded to promote research and development in applied research and technology with industrial potential in the green energy sector.CHOSE involves several research groups of the Tor Vergata University from Electrical/Industrial Engineering to Chemistry and Physics and has collaboration agreements with several other Universities and research centers in Italy, in Europe and in the rest of the world.

The main objectives of the center are:

Research and Development in the field of on organic and hybrid photovoltaics, (OPV)

Definition of an industrialization process for OPV

Technology transfer to Large and SME

Reference point at regional level on photovoltaic technologies

Participate to the Italian/european networks on photovoltaic technologies

ABSTRACT
We fabricated monolithic solid state modules based on organometal CH3NH3PbI3 and CH3NH3PbI3-xClx perovskites using poly-(3-hexylthiophene) and Spiro-OMeTAD as hole transport materials (HTMs). In particular, we developed innovative and scalable patterning procedures to minimize the series resistance at the integrated series-interconnections. By using these optimization steps, we reached a maximum conversion efficiency of 8.2% under AM1.5G at 1 Sun illumination conditions using the CH3NH3PbI3-xClx perovskite and the poly-(3-hexylthiophene) as HTM. Finally, we investigated the double-step deposition of CH3NH3PbI3 using the Spiro-OMeTAD, reaching a maximum conversion efficiency on active area (10.08 cm2) equal to 13.0% (9.1% on aperture area) under AM1.5G at 1 Sun illumination conditions. This remarkable result represents the highest PCE value reached for the perovskite solar modules.

PEROVSKITE MODULE

We fabricated the first perovskite-based monolithic series-type module showing very promising results in terms of the power conversion efficiency, the reproducibility of the fabrication process and long-term stability.